Combustion Adjustment; Pump Pressure; Combustion Head Setting - Riello 40 F20 Montage- Und Bedienungsanleitung

COMBUSTION ADJUSTMENT

In conformity with EN267 the application of the burner on the boiler, adjustment and testing must be
carried out observing the instruction manual of the boiler, including verification of the CO and CO
concentration in the flue gases, their temperatures and the average temperature of the water in the
boiler.
To suit the required appliance output, fit the nozzle then adjust the pump pressure, the setting of the
combustion head and the air damper opening in accordance with the following schedule.
The values shown in the table are measured on a CEN boiler (as per EN 267).
They refer to 12.5% CO
Nozzle
1
GPH Angle
2.00 60°
2.25 60°
2.50 60°
3.00 60°
3.50 60°
4.00 60° / 45°
4.50 60° / 45°
1
NOZZLES RECOMMENDED: Monarch type R - PLP ; Delavan type B - W
Angle :
2
PUMP PRESSURE: 12 bar - the pump leaves the factory set at this value
3

COMBUSTION HEAD SETTING

This is done when fitting the nozzle, with the
blast tube removed. It depends on the output
of the burner and is carried out by rotating the
regulating rod, till the terminal plane of the
blast tube is level with the set-point, as indicat-
ed in the schedule.
In the sketch on the left, the combustion head
is set for an output of 3.50 GPH at 12 bar,
while the shutter is level with set-point 3.5, as
required by the above schedule.
2401
at sea level and with light oil and room temperature of 20 °C.
2

Pump pressure

Burner output
2
bar
12
12
12
12
12
12
12
Steinen type S - SS ; Danfoss type S - B
60° : in most cases. Particularly suited to avoid flame-detach-
ment during ignition.
45° : for narrow and long combustion-chambers.
14 bar - improves flame retention; it is therefore suitable for ignitions at
low temperatures.
Comb. head
adjustment
kg/h ± 4% Set-point
8.0
9.0
10.0
12.0
14.0
16.1
18.0
Terminal plane of the blast tube
D5284
Blast tube
7
GB
Air damper
adjustment
3 4
Set-point
1 2.2
1.5 2.6
2 2.8
2.5 3.5
3.5 4.0
5 5.5
6 6.5
2
5 3 1
Regulating rod
Shutter
2